/* NLS频谱健康站 — instrument-dark / paper-light */
:root {
  color-scheme: light dark;
  --bg: #f4f1ea;
  --bg-elev: #fffdf8;
  --bg-soft: #ebe6db;
  --ink: #1a222e;
  --ink-2: #3d4a5c;
  --muted: #6b778a;
  --line: rgba(26, 34, 46, 0.12);
  --accent: #0f8f6a;
  --accent-2: #0b6ea8;
  --warn: #a16207;
  --danger: #b45309;
  --shadow: 0 10px 30px rgba(26, 34, 46, 0.08);
  --radius: 16px;
  --max: 1080px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", ui-sans-serif, system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  --player-h: 76px;
  --nav-h: 64px;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --bg-elev: #121a2b;
  --bg-soft: #172033;
  --ink: #e8eef7;
  --ink-2: #c3cedf;
  --muted: #8b9bb0;
  --line: rgba(232, 238, 247, 0.1);
  --accent: #3ddc97;
  --accent-2: #6ecbff;
  --warn: #f5c542;
  --danger: #ff8a5c;
  --shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  padding-bottom: calc(var(--player-h) + 24px);
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input { font: inherit; color: inherit; }

.wrap {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand img { width: 34px; height: 34px; }
.brand span { font-size: 15px; }
.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav a, .icon-btn {
  color: var(--ink-2);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
}
.nav a:hover, .icon-btn:hover {
  background: var(--bg-soft);
  text-decoration: none;
}
.nav a.active {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* Hero */
.hero {
  padding: 48px 0 28px;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.hero-kicker::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--accent);
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.hero .slogan {
  margin: 0 0 18px;
  color: var(--ink-2);
  font-size: clamp(16px, 2.4vw, 20px);
}
.hero .lede {
  max-width: 62ch;
  color: var(--muted);
  margin: 0 0 24px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { text-decoration: none; border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: #06251a;
}
[data-theme="light"] .btn-primary { color: #fff; }
.btn-ghost { background: transparent; }

/* Cards / sections */
.section { padding: 28px 0 8px; }
.section h2 {
  margin: 0 0 16px;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.section-sub { color: var(--muted); margin: -8px 0 18px; }

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}
.card a {
  color: inherit;
  text-decoration: none;
  display: block;
  height: 100%;
}
.card-cover {
  aspect-ratio: 1;
  background: var(--bg-soft);
  overflow: hidden;
}
.card-cover img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: 14px 16px 18px; }
.card-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
  font-family: var(--mono);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.4;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Episode list rows */
.ep-list { display: grid; gap: 12px; }
.ep-row {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 12px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.ep-row img {
  width: 88px; height: 88px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--bg-soft);
}
.ep-row h3 { margin: 0 0 6px; font-size: 16px; }
.ep-row .meta { color: var(--muted); font-size: 12px; font-family: var(--mono); }
.ep-row .actions { display: flex; flex-direction: column; gap: 8px; }
.play-sm {
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
}
.play-sm:hover { background: color-mix(in srgb, var(--accent) 20%, transparent); }

/* Search */
.search-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}
.search-bar input {
  flex: 1;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 12px 14px;
  outline: none;
}
.search-bar input:focus {
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent);
}
.search-count { color: var(--muted); font-size: 13px; margin-bottom: 12px; }

/* Episode detail */
.ep-detail {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  padding: 36px 0 12px;
}
.ep-detail .cover {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-elev);
  position: sticky;
  top: calc(var(--nav-h) + 16px);
}
.ep-detail h1 {
  margin: 8px 0 12px;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.25;
}
.ep-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  color: var(--muted);
  font-size: 13px;
  font-family: var(--mono);
  margin-bottom: 18px;
}
.ep-summary {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  color: var(--ink-2);
  margin-bottom: 22px;
}
.highlights { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.highlights li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-elev);
}
.highlights .t {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 13px;
  padding-top: 2px;
}
.highlights strong { display: block; margin-bottom: 2px; }
.highlights span { color: var(--muted); font-size: 14px; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 28px 0 8px;
  flex-wrap: wrap;
}

/* About / disclaimer */
.prose {
  max-width: 70ch;
  padding: 36px 0 20px;
}
.prose h1 { margin-top: 0; font-size: clamp(26px, 4vw, 36px); }
.prose h2 { margin-top: 28px; font-size: 20px; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { padding-left: 1.2em; }
.callout {
  border-left: 3px solid var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--bg-elev));
  padding: 14px 16px;
  border-radius: 0 12px 12px 0;
  color: var(--ink-2);
  margin: 16px 0;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 20px; }
.chip {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--ink-2);
}

/* Mini player */
.mini-player {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  height: var(--player-h);
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  transform: translateY(110%);
  transition: transform .25s ease;
}
.mini-player.is-on { transform: translateY(0); }
.mini-player .inner {
  height: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  grid-template-rows: 1fr 3px;
  gap: 0 14px;
  align-items: center;
  padding-bottom: 0;
}
.mini-player .inner > img,
.mini-player .inner > .mp-info,
.mini-player .inner > .mp-controls,
.mini-player .inner > .mp-time { grid-row: 1; }
.mini-player .inner > img { grid-column: 1; }
.mini-player .inner > .mp-info { grid-column: 2; }
.mini-player .inner > .mp-controls { grid-column: 3; }
.mini-player .inner > .mp-time { grid-column: 4; }
.mini-player .inner > .mp-progress {
  grid-column: 1 / -1;
  grid-row: 2;
}
.mini-player img {
  width: 48px; height: 48px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--bg-soft);
}
.mp-info { min-width: 0; }
.mp-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mp-sub { font-size: 12px; color: var(--muted); }
.mp-controls { display: flex; align-items: center; gap: 6px; }
.mp-controls button {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  width: 40px; height: 40px;
  border-radius: 999px;
  cursor: pointer;
  display: grid;
  place-items: center;
}
.mp-controls button.primary {
  background: var(--accent);
  border-color: transparent;
  color: #06251a;
  width: 44px; height: 44px;
}
[data-theme="light"] .mp-controls button.primary { color: #fff; }
.mp-progress {
  grid-column: 1 / -1;
  height: 3px;
  background: var(--bg-soft);
  cursor: pointer;
  position: relative;
}
.mp-progress > i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent);
}
.mp-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  min-width: 88px;
  text-align: right;
}

/* Footer */
.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding: 28px 0 20px;
  color: var(--muted);
  font-size: 13px;
}
.site-footer .links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  margin-bottom: 10px;
}
.site-footer a { color: var(--ink-2); }

/* Empty */
.empty {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  color: var(--muted);
  text-align: center;
}

/* Responsive */
@media (max-width: 760px) {
  .ep-detail { grid-template-columns: 1fr; }
  .ep-detail .cover { position: static; max-width: 280px; }
  .ep-row { grid-template-columns: 72px 1fr; }
  .ep-row img { width: 72px; height: 72px; }
  .ep-row .actions { grid-column: 2; flex-direction: row; }
  .nav a { padding: 8px 8px; font-size: 13px; }
  .brand span { display: none; }
  .mini-player .inner { grid-template-columns: auto 1fr auto; }
  .mini-player .inner > .mp-time { display: none; }
}

/* Related */
.related-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.related-list a {
  display: block; padding: 12px 14px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink);
  text-decoration: none; font-weight: 600;
}
.related-list a:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); text-decoration: none; }